Here are the first 5 terms of a sequence.
25, 22, 19, 16, 13
Find an expression, in terms of nnn, for the n n\,nth term of this sequence.
Hence find the 20th term of the sequence.
208 exam-style questions on OCR GCSE Maths Sequences (Nth Term). Each one has a worked solution and a mark scheme showing where the marks go.